How to export Alembic Mesh Sequence Cache to FBX?
Humm. If we take into account that alembic is a cache format, similar to a dmm or pc2, what should be done is to export the first frame as .obj, and then create a dmm / pc2 of that sequence. I do not know if it works well ... The fact is that alembic separates the different meshes, so you must make a "key shape" for each component, not as a cache. This you can see if in the timeline, each frame is marked, which does not happen with alembic. That's where things go ... (I'm not very expert in Blender, but that will generate a considerable size in Mb ..) Besides, each software company has "its peculiarities" when it comes to interpreting a FBX.